disk.c revision 1.2.2.2
1 1.2.2.2 thorpej /* $NetBSD: disk.c,v 1.2.2.2 2002/01/10 19:48:35 thorpej Exp $ */ 2 1.2.2.2 thorpej 3 1.2.2.2 thorpej /* 4 1.2.2.2 thorpej * Copyright (c) 1992, 1993 5 1.2.2.2 thorpej * The Regents of the University of California. All rights reserved. 6 1.2.2.2 thorpej * 7 1.2.2.2 thorpej * This code is derived from software contributed to Berkeley by 8 1.2.2.2 thorpej * Van Jacobson of Lawrence Berkeley Laboratory and Ralph Campbell. 9 1.2.2.2 thorpej * 10 1.2.2.2 thorpej * Redistribution and use in source and binary forms, with or without 11 1.2.2.2 thorpej * modification, are permitted provided that the following conditions 12 1.2.2.2 thorpej * are met: 13 1.2.2.2 thorpej * 1. Redistributions of source code must retain the above copyright 14 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer. 15 1.2.2.2 thorpej * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.2.2 thorpej * notice, this list of conditions and the following disclaimer in the 17 1.2.2.2 thorpej * documentation and/or other materials provided with the distribution. 18 1.2.2.2 thorpej * 3. All advertising materials mentioning features or use of this software 19 1.2.2.2 thorpej * must display the following acknowledgement: 20 1.2.2.2 thorpej * This product includes software developed by the University of 21 1.2.2.2 thorpej * California, Berkeley and its contributors. 22 1.2.2.2 thorpej * 4. Neither the name of the University nor the names of its contributors 23 1.2.2.2 thorpej * may be used to endorse or promote products derived from this software 24 1.2.2.2 thorpej * without specific prior written permission. 25 1.2.2.2 thorpej * 26 1.2.2.2 thorpej * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 1.2.2.2 thorpej * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 1.2.2.2 thorpej * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 1.2.2.2 thorpej * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 1.2.2.2 thorpej * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 1.2.2.2 thorpej * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 1.2.2.2 thorpej * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 1.2.2.2 thorpej * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 1.2.2.2 thorpej * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 1.2.2.2 thorpej * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 1.2.2.2 thorpej * SUCH DAMAGE. 37 1.2.2.2 thorpej * 38 1.2.2.2 thorpej * @(#)disk.c 8.1 (Berkeley) 6/10/93 39 1.2.2.2 thorpej */ 40 1.2.2.2 thorpej 41 1.2.2.2 thorpej #include <lib/libsa/stand.h> 42 1.2.2.2 thorpej #include <machine/stdarg.h> 43 1.2.2.2 thorpej 44 1.2.2.2 thorpej #include <sys/param.h> 45 1.2.2.2 thorpej #include <sys/disklabel.h> 46 1.2.2.2 thorpej 47 1.2.2.2 thorpej #include <dev/arcbios/arcbios.h> 48 1.2.2.2 thorpej 49 1.2.2.2 thorpej #include "common.h" 50 1.2.2.2 thorpej #include "disk.h" 51 1.2.2.2 thorpej 52 1.2.2.2 thorpej #define RF_PROTECTED_SECTORS 64 /* XXX refer to <.../rf_optnames.h> */ 53 1.2.2.2 thorpej 54 1.2.2.2 thorpej extern const struct arcbios_fv *ARCBIOS; 55 1.2.2.2 thorpej 56 1.2.2.2 thorpej struct disk_softc { 57 1.2.2.2 thorpej int sc_fd; /* PROM file id */ 58 1.2.2.2 thorpej int sc_part; /* disk partition number */ 59 1.2.2.2 thorpej struct disklabel sc_label; /* disk label for this disk */ 60 1.2.2.2 thorpej }; 61 1.2.2.2 thorpej 62 1.2.2.2 thorpej int 63 1.2.2.2 thorpej diskstrategy(devdata, rw, bn, reqcnt, addr, cnt) 64 1.2.2.2 thorpej void *devdata; 65 1.2.2.2 thorpej int rw; 66 1.2.2.2 thorpej daddr_t bn; 67 1.2.2.2 thorpej size_t reqcnt; 68 1.2.2.2 thorpej void *addr; 69 1.2.2.2 thorpej size_t *cnt; /* out: number of bytes transfered */ 70 1.2.2.2 thorpej { 71 1.2.2.2 thorpej struct disk_softc *sc = (struct disk_softc *)devdata; 72 1.2.2.2 thorpej int part = sc->sc_part; 73 1.2.2.2 thorpej struct partition *pp = &sc->sc_label.d_partitions[part]; 74 1.2.2.2 thorpej int s; 75 1.2.2.2 thorpej int64_t offset; 76 1.2.2.2 thorpej int count; 77 1.2.2.2 thorpej 78 1.2.2.2 thorpej offset = bn; 79 1.2.2.2 thorpej 80 1.2.2.2 thorpej /* 81 1.2.2.2 thorpej * Partial-block transfers not handled. 82 1.2.2.2 thorpej */ 83 1.2.2.2 thorpej if (reqcnt & (DEV_BSIZE - 1)) { 84 1.2.2.2 thorpej *cnt = 0; 85 1.2.2.2 thorpej return (EINVAL); 86 1.2.2.2 thorpej } 87 1.2.2.2 thorpej 88 1.2.2.2 thorpej offset += pp->p_offset; 89 1.2.2.2 thorpej 90 1.2.2.2 thorpej if (pp->p_fstype == FS_RAID) 91 1.2.2.2 thorpej offset += RF_PROTECTED_SECTORS; 92 1.2.2.2 thorpej 93 1.2.2.2 thorpej /* 94 1.2.2.2 thorpej * Convert from blocks to bytes. 95 1.2.2.2 thorpej */ 96 1.2.2.2 thorpej offset *= DEV_BSIZE; 97 1.2.2.2 thorpej 98 1.2.2.2 thorpej s = ARCBIOS->Seek(sc->sc_fd, &offset, 0); 99 1.2.2.2 thorpej s = ARCBIOS->Read(sc->sc_fd, addr, reqcnt, &count); 100 1.2.2.2 thorpej 101 1.2.2.2 thorpej if (s < 0) 102 1.2.2.2 thorpej return (EIO); 103 1.2.2.2 thorpej 104 1.2.2.2 thorpej *cnt = count; 105 1.2.2.2 thorpej return (0); 106 1.2.2.2 thorpej } 107 1.2.2.2 thorpej 108 1.2.2.2 thorpej int 109 1.2.2.2 thorpej diskopen(struct open_file *f, ...) 110 1.2.2.2 thorpej { 111 1.2.2.2 thorpej int ctlr, unit, part; 112 1.2.2.2 thorpej 113 1.2.2.2 thorpej struct disk_softc *sc; 114 1.2.2.2 thorpej struct disklabel *lp; 115 1.2.2.2 thorpej #ifdef arc 116 1.2.2.2 thorpej char *msg, buf[DEV_BSIZE]; 117 1.2.2.2 thorpej #endif 118 1.2.2.2 thorpej int i, cnt; 119 1.2.2.2 thorpej char *device; 120 1.2.2.2 thorpej va_list ap; 121 1.2.2.2 thorpej 122 1.2.2.2 thorpej va_start(ap, f); 123 1.2.2.2 thorpej 124 1.2.2.2 thorpej device = va_arg(ap, char *); 125 1.2.2.2 thorpej 126 1.2.2.2 thorpej /* 127 1.2.2.2 thorpej * For NetBSD/sgimips, since we use the SGI partition map directly, 128 1.2.2.2 thorpej * we fake an in-core NetBSD disklabel with offset of 0. 129 1.2.2.2 thorpej * 130 1.2.2.2 thorpej * For NetBSD/arc, there is a MBR partition map on the disk, which we 131 1.2.2.2 thorpej * then expect to find a NetBSD disklabel within the MBR partition. 132 1.2.2.2 thorpej * We require that the kernel be located in first partition in the 133 1.2.2.2 thorpej * NetBSD disklabel, because we have not other way to represent the 134 1.2.2.2 thorpej * root partition. 135 1.2.2.2 thorpej */ 136 1.2.2.2 thorpej part = 0; 137 1.2.2.2 thorpej 138 1.2.2.2 thorpej if (part >= 16) 139 1.2.2.2 thorpej return (ENXIO); 140 1.2.2.2 thorpej 141 1.2.2.2 thorpej if (ARCBIOS->Open(device, 0, &i)) { 142 1.2.2.2 thorpej printf("open failed\n"); 143 1.2.2.2 thorpej return (ENXIO); 144 1.2.2.2 thorpej } 145 1.2.2.2 thorpej 146 1.2.2.2 thorpej sc = alloc(sizeof(struct disk_softc)); 147 1.2.2.2 thorpej memset(sc, 0, sizeof(struct disk_softc)); 148 1.2.2.2 thorpej f->f_devdata = (void *)sc; 149 1.2.2.2 thorpej 150 1.2.2.2 thorpej sc->sc_fd = i; 151 1.2.2.2 thorpej sc->sc_part = part; 152 1.2.2.2 thorpej 153 1.2.2.2 thorpej /* try to read disk label and partition table information */ 154 1.2.2.2 thorpej lp = &sc->sc_label; 155 1.2.2.2 thorpej lp->d_secsize = DEV_BSIZE; 156 1.2.2.2 thorpej lp->d_secpercyl = 1; 157 1.2.2.2 thorpej lp->d_npartitions = MAXPARTITIONS; 158 1.2.2.2 thorpej lp->d_partitions[part].p_offset = 0; 159 1.2.2.2 thorpej lp->d_partitions[part].p_size = 0x7fffffff; 160 1.2.2.2 thorpej 161 1.2.2.2 thorpej #ifdef arc 162 1.2.2.2 thorpej i = diskstrategy(sc, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, 163 1.2.2.2 thorpej buf, &cnt); 164 1.2.2.2 thorpej if (i || cnt != DEV_BSIZE) { 165 1.2.2.2 thorpej printf("%s: error reading disk label\n", device); 166 1.2.2.2 thorpej free(sc, sizeof(struct disk_softc)); 167 1.2.2.2 thorpej return (ENXIO); 168 1.2.2.2 thorpej } 169 1.2.2.2 thorpej msg = getdisklabel(buf, lp); 170 1.2.2.2 thorpej if (msg) { 171 1.2.2.2 thorpej /* If no label, just assume 0 and return */ 172 1.2.2.2 thorpej return (0); 173 1.2.2.2 thorpej } 174 1.2.2.2 thorpej #endif 175 1.2.2.2 thorpej 176 1.2.2.2 thorpej if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) { 177 1.2.2.2 thorpej free(sc, sizeof(struct disk_softc)); 178 1.2.2.2 thorpej return (ENXIO); 179 1.2.2.2 thorpej } 180 1.2.2.2 thorpej return (0); 181 1.2.2.2 thorpej } 182 1.2.2.2 thorpej 183 1.2.2.2 thorpej #ifndef LIBSA_NO_DEV_CLOSE 184 1.2.2.2 thorpej int 185 1.2.2.2 thorpej diskclose(f) 186 1.2.2.2 thorpej struct open_file *f; 187 1.2.2.2 thorpej { 188 1.2.2.2 thorpej ARCBIOS->Close(((struct disk_softc *)(f->f_devdata))->sc_fd); 189 1.2.2.2 thorpej free(f->f_devdata, sizeof(struct disk_softc)); 190 1.2.2.2 thorpej f->f_devdata = (void *)0; 191 1.2.2.2 thorpej return (0); 192 1.2.2.2 thorpej } 193 1.2.2.2 thorpej #endif 194
Indexes created Fri Oct 03 02:09:57 GMT 2025